# Professor Jan Hartzenbosch — Four-Day Planet character guide

> Professor Jan Hartzenbosch in Four-Day Planet by H. Beam Piper.

**Role:** minor

**Also known as:** old Professor Hartzenbosch, Professor Hartzenbosch

**First appearance:** 0001-four-day-planet

## Who they are

An elderly scientist with knowledge of the planet's history.

## Links

- HTML: https://www.betterreads.online/discover/four_day_planet_se/characters/professor_hartzenbosch
- Book: https://www.betterreads.online/discover/four_day_planet_se
- All characters: https://www.betterreads.online/discover/four_day_planet_se/characters